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<br />. <br /> <br />. <br /> <br />. <br /> <br />1'\) <br />W <br />~ <br />~ <br /> <br />population has been rapidly increasing. Monthly quality sampling by <br />the California Regional Water Quality Control Board has documented <br />the following water quality conditions: 1/ <br /> <br />1. Plainly visible sewage solids, rubbish, garbage, and dead <br /> <br />aquatic organisms. <br /> <br />2. Dissolved oxygen contents at or near zero concentration <br /> <br />levels. <br /> <br />3. Biochemical oxygen demand exceeding 830 milligrams per <br /> <br />liter (mg/I). <br /> <br />4. Salinity concentrations exceeding 7,000 mg/I total dissolved <br /> <br />solids. <br /> <br />5. <br /> <br />Fecal coliform levels exceeding 110 million colonies per 100 <br /> <br />milliliters (ml). <br /> <br />6. <br /> <br />Totally unsuitable conditions for survival of most aquatic <br /> <br />organisms. <br /> <br />7. Offensive odors and generally negative aesthetic conditions. <br /> <br />No single drain in the Imperial Valley discharges the nearly 100 <br />ft3/s requi red for a desalting plant to produce the 42,000 acre-feet <br /> <br />per year needed as reject stream replacement. However, the Alamo <br /> <br />River, a river with almost no natural flows, receives drainage dis- <br /> <br />charge from most of the lands in the east and central part of the <br /> <br />valley. Agricultural drainage could be treated, then, by using Alamo <br /> <br />River flows as feed water for a desalting plant. Minimum flows at <br /> <br />y <br /> <br />Water Quality Control Planning Program Work Plan for the period <br />1976-1981; California Regional Water Quality Control Board, Colorado <br />River Basin Region, November 1976. <br /> <br />20 <br />